This device is a new standard modified according to ASTM e1886-2005, ASTM e1996-2008 and other foreign standards, “building curtain wall and doors and Windows resistance to wind carrying debris impact performance classification and testing methods.” designed and developed a kind of resistance to wind carrying debris impact performance testing equipment. The device is simple in design, easy to assemble, adjustable in pressure, adjustable in launching height, easy to operate. 1. standard of execution GBT29738-2013 Graduations and test method for performance of exterior windows and doors, curtain walls impacted by windborne debris in windstorm. 2. Main technical parameters 1）Ambient temperature: -10℃ ~ 50℃; 2）Working pressure of air gun: 0.4-0.8mpa; 3）Ambient temperature: -10℃ ~ 50℃; 4）Steel ball requirements: mass 2g±0.1g, diameter 8mm; 5）Steel ball launching speed: 39.7m/s； 6）Rated voltage of solenoid valve: 220V ac; 3. Product features This device uses two photoelectric sensors of the same model and records the time of the emitter passing through the two sensors through an electronic timer. The response frequency of the electronic timer shall be no less than 10KHz and the response time shall be no more than 0.15ms. The velocity of the emission is the distance between the two photosensors divided by the time calculated by the electronic chronograph.